diff options
Diffstat (limited to 'mm/hwpoison-inject.c')
| -rw-r--r-- | mm/hwpoison-inject.c | 34 |
1 files changed, 19 insertions, 15 deletions
diff --git a/mm/hwpoison-inject.c b/mm/hwpoison-inject.c index 10ea71905c1..95487c71cad 100644 --- a/mm/hwpoison-inject.c +++ b/mm/hwpoison-inject.c @@ -1,10 +1,11 @@ -/* Inject a hwpoison memory failure on a arbitary pfn */ +/* Inject a hwpoison memory failure on a arbitrary pfn */ #include <linux/module.h> #include <linux/debugfs.h> #include <linux/kernel.h> #include <linux/mm.h> #include <linux/swap.h> #include <linux/pagemap.h> +#include <linux/hugetlb.h> #include "internal.h" static struct dentry *hwpoison_dir; @@ -13,46 +14,49 @@ static int hwpoison_inject(void *data, u64 val) { unsigned long pfn = val; struct page *p; + struct page *hpage; int err; if (!capable(CAP_SYS_ADMIN)) return -EPERM; - if (!hwpoison_filter_enable) - goto inject; if (!pfn_valid(pfn)) return -ENXIO; p = pfn_to_page(pfn); + hpage = compound_head(p); /* * This implies unable to support free buddy pages. */ - if (!get_page_unless_zero(p)) + if (!get_page_unless_zero(hpage)) return 0; - if (!PageLRU(p)) + if (!hwpoison_filter_enable) + goto inject; + + if (!PageLRU(p) && !PageHuge(p)) shake_page(p, 0); /* * This implies unable to support non-LRU pages. */ - if (!PageLRU(p)) + if (!PageLRU(p) && !PageHuge(p)) return 0; /* * do a racy check with elevated page count, to make sure PG_hwpoison * will only be set for the targeted owner (or on a free page). * We temporarily take page lock for try_get_mem_cgroup_from_page(). - * __memory_failure() will redo the check reliably inside page lock. + * memory_failure() will redo the check reliably inside page lock. */ - lock_page(p); - err = hwpoison_filter(p); - unlock_page(p); + lock_page(hpage); + err = hwpoison_filter(hpage); + unlock_page(hpage); if (err) return 0; inject: - printk(KERN_INFO "Injecting memory failure at pfn %lx\n", pfn); - return __memory_failure(pfn, 18, MF_COUNT_INCREASED); + pr_info("Injecting memory failure at pfn %#lx\n", pfn); + return memory_failure(pfn, 18, MF_COUNT_INCREASED); } static int hwpoison_unpoison(void *data, u64 val) @@ -85,12 +89,12 @@ static int pfn_inject_init(void) * hardware status change, hence do not require hardware support. * They are mainly for testing hwpoison in software level. */ - dentry = debugfs_create_file("corrupt-pfn", 0600, hwpoison_dir, + dentry = debugfs_create_file("corrupt-pfn", 0200, hwpoison_dir, NULL, &hwpoison_fops); if (!dentry) goto fail; - dentry = debugfs_create_file("unpoison-pfn", 0600, hwpoison_dir, + dentry = debugfs_create_file("unpoison-pfn", 0200, hwpoison_dir, NULL, &unpoison_fops); if (!dentry) goto fail; @@ -120,7 +124,7 @@ static int pfn_inject_init(void) if (!dentry) goto fail; -#ifdef CONFIG_CGROUP_MEM_RES_CTLR_SWAP +#ifdef CONFIG_MEMCG_SWAP dentry = debugfs_create_u64("corrupt-filter-memcg", 0600, hwpoison_dir, &hwpoison_filter_memcg); if (!dentry) |